[docs] [issue21761] language reference describes the role of module.__file__ inaccurately

[Eric Snow]

Changes by Eric Snow <ericsnowcurrently at gmail.com>:


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assignee:  -> docs at python
components: +Documentation
nosy: +docs at python
stage:  -> needs patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21761>
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